Governor for explosive engines



May 22, 1923. 1,455,807

N.PEDERSON GOVERNOR FOR EXPLOSIVE ENGINES Filed March 12, 1921 Chrome 21threaded into lugs 21.

EEDEESON, TRENT, SOUTH DOTA.

GOVERNOR FOR EKPLOSIVE ENGINES.

Application filed March 12, 1921. Serial No. 451,782.

To all whom it may concern.

Be it known that I, Nnns PEDERSON, a citizen of the United States,residing .at Trent, in the county of Moody and State of South Dakota,have invented a new and useful Governor for Explosive Engines, of whichthe followin is a specification.

My invention re ates to speed governors for explosive engines and theobject is to provide a simple and eflicient device particularly adaptedfor tractor engines many of which are not provided with governors of anydescription.

In the accompanying drawing:

Fig. 1 is a side elevation of an explosive type engine with my improveddevice in operative connect-ion and position, part of the engine beingomitted.

Fig. 2 is a front elevation of the main working parts of my device inthe hub portion of the cooling fan.

Fig. 3 is a sectional elevation on line 3-3 of Fig. 2.

Fig. 4 is an enlarged detail section as on line 44 of Fig. 1.-

Fig. 5 is an end elevation of the bell crank lpvgrs within the governorhousing or fan Referring to the drawing by reference numerals, 6designates a tractor engine of the explosive type having a fan 7 at itsfront end suspended in a bracket 8 forming a part of water outlet pipe 9at the front end of water manifold 10 on top of cylinder head 11.

12 is a as intake manifold of hollow construction iaving the usual mixinchamber 13 with hot air inlet 14, fuel inta e 15, and butterfly valve16,. all within the vertical center portion '12" of the manifold withthe valve arranged so as to regulate the amount of gas mixture to bedrawn into the cylinders of the engine.

My device is designed to operate on the lever 17 fixed on shaft 18 ofthe butterfly valve 16, and this I accomplish by the followingconstruction.

The main working parts of the governor are inclosed in a hollowcylindrical housing 19 with a cover plate 20 secured with screws Saidhousing is used as the hub of the cooling fan, the wings or fan blades22 being secured to its periphery at properly spaced points. The housing19 is secured as with screws 23 to the outer end of the fan pulley 24,which rotateson a stationary shaft 25, held in a holder 26 which in turnis held in bracket 8 or other stationary part of the engine.

lVithin the housing 19 I have two op ositely disposed counterbalances orweig ts 27, 28, the former being merely a metal weight securedpermanently as at 29, the latter has its small end pivotally secured at30 to the inner wall of housing 19 and its other end made heavier asshown at 31 in Fig. 2 and held suspended by a spring 32 one end of whichis attached to an eye screw 33 having its shank threaded and projectingthrough the flange of housing 19, the exposed outer end having a nut 34to regulate the tension of spring 32.

An eye-bolt 35 secured to counterweight 28 near its middle has anelongated eye 35 engagedby a pin 36 (see Figs. 3 and 5) in the rear endof a small yoke-shaped bell crank lever formed of two L-shaped bars 37and 37 and pivotally secured at 37 to .brackets 38 and 38 respectively,said brackets being secured to inner wall of housing 19 as at 39. Thefront end of the bell crank lever carries a roller40 rotatable on a pin41. Said roller 40 at all times ongages the free end of a leaf spring 42which has its other end secured at 43 on counterweight 27. A plunger rod44 engages the side of the spring opposite the roller 40, said plungeror push rod extending centrally through the stationary shaft 25 andprojecting out through the rear end of same and there coming in contactwith the lower end of a lever 45 which is fulcrumed at 46 in a bracket47 suitably secured as at 48 on the shaft 25 or on some other stationarypart of the engine.

The upper arm of lever 45 is'pivotally connected to a rod 49 which ispivotally connected with its other end as at 50 (see Figs. 1 and 4) toany one of a row of holes 51 in the upright arm of a bell crank lever 52which is pivoted at 53 to a bracket 54 socured as at 55 to a part of theengine near the gas intake manifold 12. The horizontal arm of bell crank52 has its rear end pivoted loosely as at 56 to the upper end of a link57 which may have a half a turn or twist and its lower end pivotallyconnected as at 58 to arm 17 operating the butterfly valve.

In the operation of my device it will first be understood that to getuniformity in plowing on level ground and up or own grade, uniform speedof the tractor is necessa and to get this without changing spee gears itis of course necessary to regulate engine speed which my device does inthe following manner.

When the usual fuel feed control lever (not shown) near the operator hasbeen set and the speed gears for plowingspeed are in operation andspring 32 given the desired tension, the tractor plows level ground at acertain predetermined speed and my device does not function. But when adown grad is reached the gravity of the tractor causes it to increaseits speed and without a governor the engine will also increase itsspeed. At such time, ona tractor having my device the motor speed isautomatically maintained because when engine speed increases the lowerfan driving pulley 59,

which is fixed on crank shaft 59 of the engine, drives belt 60 andpulley 24 and the governor whereby weight 28 is swung outward by thecentrifugal force, thereby pulling on pin 36 of bell crank 37, 3?,pushing roller 40 against leaf spring 42 which in turn pushes plungerrod 44 and thereby lever 45, the upper end of which pulls rod 49 actingon bell crank 52. The rear arm of said bell crank is raised by theaboveac tion, thereby pulling link 57 upward and turning lever 17 of thebutterfly valve say as from open position 16 to semi-closed position 16which action reduces the amount of gas drawn into the cylinders thusweakening the explosions in the cylinders and thereby reducing power ofengine. When level groundis reached the springs 32 and 42 not beingstrained by attempted high speed of the engine restore the governor tonormal operation. y

In going up grade it is ofcourse necessarv to increase the richness ofthe mixture and thereby the power of the engine Without increasing itsspeed and to accomplish this I provide an auxiliary device composed of atoothed sector 61, a lever 62 pivoted thereto and carrying a pawl 63engaging the sector. The lever 62 is connected to the upper arm of bellcrank 52 by a rod 64 and spring 65." By manipulating lever 62 it will bereadily seen that the valve can be held more or less or even wide openagainst the action of the governor, thus permitting a rich mixture andfree flow of gas into the cylinders when climbing a grade.. Having thusdescribed my inventionwhat I claim is:

The combination ofan explosive type enginehaving a cylindrical revolvingmember and a rod extending centrally out of the cylinder to act uponvalve controlling means of the engine, means within the cylinder foractuating said rod and comprising a leaf spring secured with one endnear the inner periphery of the cylinder and extending with its otherend across the inner end of the slidable rod in a slanting position,allowing the rod to normally project partly into th cylinder, a bellcrank lever mounted in the cylinder and having in one arm anantifriction roller bearing on the leaf spring, the other arm beingoperatively connected to a lever pivoted at one end and having at itsother end a centrifugal weight, a spring resisting the swing of saidweighted lever,v

and a counterbalancing weight fixed in the cylinder diametricallyopposite the weighted lever.

In testimony whereof I afiix my signature.

NELS 'PEDERSON.

